fix(ci): link soul.c only — drop multi-module cc that triggers capability #error

elb generates a dist/soul.c with all El modules inlined. Linking
dist/soul.c alone is sufficient and is exactly what the local mac
build does. Including other dist/*.c files causes two failures:
  1. dist/chat.c has a capability-violation #error that fires when the
     file is compiled as a utility module (outside the cgi entrypoint).
  2. --allow-multiple-definition masked other issues silently.

Drop OTHER_C, drop --allow-multiple-definition, drop the now-unused
elp-c-decls.h generation step. The cc command now matches the proven
local build exactly.

.gitea/workflows/ci.yaml

@@ -91,44 +91,29 @@ jobs:
           echo "El SDK ready"
           /opt/el/dist/platform/elc --version || true
 
-      - name: Generate ELP master declarations header
-        run: |
-          {
-            printf '/* Auto-generated C forward declarations for ELP cross-module calls */\n'
-            printf '#pragma once\n'
-            printf '#include "el_runtime.h"\n'
-            printf '\n'
-            grep -h -E '^(el_val_t|void|int|char\*|const char\*)[[:space:]]+[a-zA-Z_][a-zA-Z0-9_]*[[:space:]]*\(' dist/*.c 2>/dev/null \
-              | grep ';$' | sort -u
-          } > dist/elp-c-decls.h
-          echo "Generated elp-c-decls.h with $(grep -c ';' dist/elp-c-decls.h 2>/dev/null || echo 0) declarations"
-
       - name: Build neuron soul binary
         run: |
           ELB=/opt/el/dist/bin/elb
           ELC=/opt/el/dist/platform/elc
           RUNTIME=/opt/el/runtime
 
-          # Compile all El modules to C.
-          # This step will fail at link on Linux: the El compiler inlines imported
-          # modules into each module's .c file, producing duplicate strong symbol
-          # definitions. GNU ld rejects these; macOS ld accepts them silently.
-          # We capture the link failure and re-link manually below.
+          # Compile all El modules to C via elb.
+          # elb fails at link on Linux (GNU ld rejects duplicate strong symbols that
+          # macOS ld accepts silently) — that's expected and captured with || true.
+          # The important output is dist/soul.c: the El compiler inlines all imported
+          # modules into the entry-point file, so soul.c is a self-contained
+          # translation unit.  We never link the other dist/*.c files — they contain
+          # the same symbols inlined again, plus capability-violation #error guards
+          # that fire when compiled outside the cgi entrypoint.
           $ELB --elc=$ELC --runtime=$RUNTIME/el_runtime.c || true
 
-          # Re-link with soul.c listed first so its real main() (from the cgi block)
-          # wins over the stub main()s generated in every other module.
-          # --allow-multiple-definition tells GNU ld to pick the first definition
-          # for each duplicate symbol — safe here because all duplicates are identical
-          # (same El source compiled independently into multiple .c files).
+          # Link only soul.c + the runtime.  No --allow-multiple-definition needed.
           mkdir -p dist
-          OTHER_C=$(ls dist/*.c | grep -v '/soul\.c$' | sort | tr '\n' ' ')
           cc -O2 -DHAVE_CURL \
             -I$RUNTIME \
-            dist/soul.c $OTHER_C \
+            dist/soul.c \
             $RUNTIME/el_runtime.c \
             -lssl -lcrypto -lcurl -lpthread -lm \
-            -Wl,--allow-multiple-definition \
             -o dist/neuron
 
           ls -lh dist/neuron